True and false. You can pivot with both feet, but not at the same time.
For instance, you could be driving towards the basket and then stop on your right foot, using that pivot foot. On the next possession, you may stop on your left foot, using that as your pivot foot.
However, you may not start using one pivot foot and switch to the other at one time. That is traveling.
In the logical sense, sentences must be either true or false and not both. "This sentence is false" cannot be true because that would mean that it is false, and it cannot be both. It also cannot be false because that would mean that it is true, and it cannot be both. Therefore, if it is true or false, then it is both true and false. Therefore it is either neither true nor false or both true and false; therefore, in the logical sense, it is not a sentence. However, it says it is a sentence; therefore, it is lying; therefore, it is false.
It is both masculine and feminine. :D
It is true and false. It cannot be proved.
True for both.